VC做的绘图程序保存的DXF文件用AutoCAD打开不了，哪里有问题
本帖最后由 VisualEleven 于 2013-01-05 17:38:27 编辑 VC做的绘图程序保存的DXF文件用AutoCAD打开不了，AutoCAD里面提示说图形头中出错，位于第3行，保存的DXF文件不是有效文件。

BOOL CTest18Doc::SaveDoc(CStdioFile *pCFile)
{
pCFile->SeekToBegin();   

CString str;
str="  0\r\n";
pCFile->WriteString(str);
str="SECTION\r\n";
pCFile->WriteString(str);
str="  2\r\n";
pCFile->WriteString(str);
str="HEADER\r\n";
pCFile->WriteString(str);
str="  0\r\n";
pCFile->WriteString(str);
str="ENDSEC\r\n";
pCFile->WriteString(str);
str="  0\r\n";
pCFile->WriteString(str);
str="SECTION\r\n";
pCFile->WriteString(str);
str="  2\r\n";
pCFile->WriteString(str);
str="ENTITIES\r\n";
pCFile->WriteString(str);
///////////////////////////
POSITIONpos = g_pDoc->m_EntityList.GetHeadPosition();
while(pos!=NULL)
{
CEntity* pEntity = (CEntity *) g_pDoc->m_EntityList.GetNext(pos);
CString str;
str=pEntity->SaveDXF();
pCFile->WriteString(str);


}
////////////////////////////
str="  0\r\n";
pCFile->WriteString(str);
str="ENDSEC\r\n";
pCFile->WriteString(str);
str="  0\r\n";
pCFile->WriteString(str);
str="EOF\r\n";
pCFile->WriteString(str);

pCFile->Close();

SetModifiedFlag(FALSE);

return TRUE;

}
直线类的SaveDXF()
CString CCircle::SaveDXF()
{
CString str, str1;

str1 = "0\r\n";
str = str + str1;
str1 = "CIRCLE\r\n";
str = str + str1;

str1 = "  8\r\n";
str = str + str1;
str1 = "0\r\n";
str = str + str1;

str1=" 10\r\n";
str=str+str1;
str1.Format("%f",m_center.x/1000);
str=str+str1+"\r\n";

str1=" 20\r\n";
str=str+str1;
str1.Format("%f",m_center.y/1000);
str=str+str1+"\r\n";

str1=" 40\r\n";
str=str+str1;
str1.Format("%f",m_radius/1000);
str=str+str1+"\r\n";


return str;
}

[解决办法]
DXF格式是怎么样的？你保存的DXF文件格式对吗？